The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board > The 1973 - 1991 Blazers, Jimmys, and Suburbans Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 05-01-2019, 10:18 PM   #1
1984 t type
Registered User
 
Join Date: Nov 2010
Location: MICHIGAN
Posts: 196
Tire size question

About to pick up a stock 84 Jimmy, suspension seems to be in real good shape and the springs do not appear to be sagging. Currently it has the stock rally wheels with 31x10.5r15 tires on it, it needs new tires and i am purchasing it out of town while im here on business and planning on ordering new wheels and tires and having them delivered to my hotel and driving it home. What im wanting to do is order a set of 18x8.5 -6mm rally wheels and mount some 285/60/18 Atturo Trail Blade X/T tires on it, they measure out at 31.5x11.5x18 so a half inch higher and 1 inch wider. Has anyone ran this size tire or think i will have any issues with them on a good stock suspension truck ?

Thanks
__________________
1987 Buick Grand National
2018 Road Glide Special
1984 t type is offline   Reply With Quote
Old 05-02-2019, 08:18 AM   #2
rpmerf
Registered User
 
rpmerf's Avatar
 
Join Date: Feb 2011
Location: Parkville, MD
Posts: 662
Re: Tire size question

I sold my neighbor my 89 K5 Blazer. He put 33x12.5s on it. They seemed to fit well. Pretty sure I drove it once after they were on, and didn't notice any rubbing. They filled out the wheel wells really nice.
__________________
1970 C20 Custom Camper - 350, TH350
1997 GMC Suburban
1994 Acura Integra GSR
1987 Dodge Daytona Shelby Z
rpmerf is offline   Reply With Quote
Old 05-02-2019, 09:44 AM   #3
Ski-me
Registered User
 
Ski-me's Avatar
 
Join Date: May 2012
Location: Colo Springs, CO
Posts: 828
Re: Tire size question

It will fit fine, I'm sure....being around 31" tall. Offset might be worth looking at, just in case though. BUT, 18" wheels may look different on these trucks. Personal taste is the main thing, but I will say that I don't see a lot of this era of truck on much bigger than 16" rims.

I've had 32x11.5r15 and 33x12.5r15 on stock height 4x4 blazers. You may have a touch of rubbing on the 33's.
__________________
- Jeff

89' K5 Blazer, 2.5" lift, 35" tires
04' GMC Yukon XL, 3/4 ton, 8.1L
Ski-me is offline   Reply With Quote
Old 05-09-2019, 06:11 PM   #4
1984 t type
Registered User
 
Join Date: Nov 2010
Location: MICHIGAN
Posts: 196
Re: Tire size question

Any idea what the ideal offset would be on a 17-18” rim ?
__________________
1987 Buick Grand National
2018 Road Glide Special
1984 t type is offline   Reply With Quote
Old 05-10-2019, 06:24 AM   #5
rpmerf
Registered User
 
rpmerf's Avatar
 
Join Date: Feb 2011
Location: Parkville, MD
Posts: 662
Re: Tire size question

Depends how wide it is. Offset is based on width, not diameter.

https://www.tirerack.com/tires/tiret...jsp?techid=101
__________________
1970 C20 Custom Camper - 350, TH350
1997 GMC Suburban
1994 Acura Integra GSR
1987 Dodge Daytona Shelby Z
rpmerf is offline   Reply With Quote
Old 05-16-2019, 12:48 AM   #6
trukman1
Registered User
 
Join Date: Apr 2001
Location: Beavercreek, Ohio 45431
Posts: 664
Re: Tire size question

I ran 33x12x15 BFG All-Terrains on stock wheels on a 1983 GMC Jimmy and had no issues whatsoever. Great ride and looked better than 31's IMO. Just saying.
__________________
1967 K30 461/TH400/Np205/D60/14FF/BDS
MTZ 375/75/16 on 16x10 Pro Comps
trukman1 is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 12:37 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Copyright 1997-2013 67-72chevytrucks.com